Issue with dependency injection arises when module definition is used

As a beginner in Angular, I'd greatly appreciate it if you could point out any rookie mistakes I may be making here.

Below is my module and controller structure:

(function () { 
    'use strict';

    angular
        .module('myApp')
        .controller('myController', MyController);

I've trimmed down the code for brevity, focusing only on the key parts.

The current code functions smoothly - the page loads without any issues.

However, trouble arises when I attempt to inject something into the module:

(function () {
    'use strict';

    angular
        .module('myApp', ['custom'])
        .controller('myController', MyController);

Upon doing this, the page fails to load altogether, yet no errors are displayed in the console.

Initially, I suspected that the custom module might not be loading correctly. So, I experimented with the following:

(function () {
    'use strict';

    angular
        .module('myApp', [])
        .controller('myController', MyController);

Unfortunately, even this modification does not work. Once again, nothing loads despite seeing similar examples using empty square brackets.

To provide context, I am working with AngularJS version 1.3.16.

Answer №1

  • angular.module('myApp', []): creates a new app that replaces the old one.
  • angular.module('myApp'): accesses the existing app.

When you call angular.module('myApp'), everything works fine. This means somewhere in your code there is a line like: angular.module('myApp', []).

The code

angular.module('myApp', ['custom'])
causes issues because it overrides the previous app.

More information can be found at https://docs.angularjs.org/guide/bootstrap

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